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44篇 您的检索式:作者名="Chenxi Sun"
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1SHP2 inhibition triggers anti-tumor immunity and synergizes with PD-1 blockade显示文摘Tyrosine phosphatase SHP2 is a promising drug target in cancer immunotherapy due to its bidirectional role in both tumor growth promotion and T-cell inactivation. Its allosteric inhibitor SHP099 is known to inhibit cancer cell growth both in vitro and in vivo. However, whether SHP099-mediated SHP2 inhibition retards tumor growth in vivo via anti-tumor immunity remains elusive. To address this, a CT-26 colon cancer xenograft model was established in mice since this cell line is insensitive to SHP099.Consequently, SHP099 minimally affected CT-26 tumor growth in immuno-deficient nude mice, but significantly decreased the tumor burden in CT-26 tumor-bearing mice with intact immune system.SHP099 augmented anti-tumor immunity, as shown by the elevated proportion of CD8tIFN-γtT cells and the upregulation of cytotoxic T-cell related genes including Granzyme B andPerforin, which decreased the tumor load. In addition, tumor growth in mice with SHP2-deficient T-cells was markedly slowed down because of enhanced anti-tumor responses. Finally, the combination of SHP099 and antiPD-1 antibody showed a higher therapeutic efficacy than either monotherapy in controlling tumor growthin two colon cancer xenograft models, indicating that these agents complement each other. Our study suggests that SHP2 inhibitor SHP099 is a promising candidate drug for cancer immunotherapy.Mingxia Zhao Wenjie Guo Yuanyuan Wu Chenxi Yang Liang Zhong Guoliang Deng Yuyu Zhu Wen Liu Yanhong Gu Yin Lu Lingdong Kong Xiangbao Meng Qiang Xu Yang Sun 2019Acta Pharmaceutica Sinica B2019,9,2:18
2Global Dynamic Molecular Profiling of Stomatal Lineage Cell Development by Single-Cell RNA Sequencing显示文摘The regulation of stomatal lineage cell development has been extensively investigated.However,a comprehensive characterization of this biological process based on single-cell transcriptome analysis has not yet been reported.In this study,we performed RNA sequencing on 12844 individual cells from the cotyledons of 5-day-old Arabidopsis seedlings.We identified 11 cell clusters corresponding mostly to cells at specific stomatal developmental stages using a series of marker genes.Comparative analysis of genes with the highest variable expression among these cell clusters revealed transcriptional networks that regulate development from meristemoid mother cells to guard mother cells.Examination of the developmental dynamics of marker genes via pseudo-time analysis revealed potential interactions between these genes.Collectively,our study opens the door for understanding how the identified novel marker genes participate in the regulation of stomatal lineage cell development.Zhixin Liu Yaping Zhou Jinggong Guo Jiaoai Li Zixia Tian Zhinan Zhu Jiajing Wang Rui Wu Bo Zhang Yongjian Hu Yijing Sun Yan Shangguan Weiqiang Li Tao Li Yunhe Hu Chenxi Guo Jean-David Rochaix Yuchen Miao Xuwu Sun 2020Molecular Plant2020,13,8:11
3Mechanism and kinetics study on the ozonolysis reaction of 2,3,7,8-TCDD in the atmosphere显示文摘The ozonolysis of 2,3,7,8-tetra-chlorodibenzo-p-dioxin(2,3,7,8-TCDD) is an efcient degradation way in the atmosphere. The ozonolysis process and possible reactions path of Criegee Intermediates with NO and H2 O are introduced in detail at the method of MPWB1K/6-31+G(d,p)//MPWB1K/6-311+G(3df,2p) level. In ozonolysis, H2O is an important source of OH radical formation and initiated the subsequent degradation reaction. The Rice-Ramsperger-Kassel-Marcus(RRKM) theory was applied to calculate rate constants with the temperature ranging from 200 to 600 K. The rate constant of reaction between 2,3,7,8-TCDD and O3 is 4.80 × 10 20cm3/(mole·sec) at 298 K and 760 Torr. The atmospheric lifetime of the reaction species was estimated according to rate constants, which is helpful for the atmospheric model study on the degradation and risk assessment of dioxin.Jing Bai Xiaomin Sun Chenxi Zhang Chen Gong Jingtian Hu Jianghua Zhang 2014Journal of Environmental Sciences2014,26,1:6
4Bimodular effects of D614G mutation on the spike glycoprotein of SARS-CoV-2 enhance protein processing,membrane fusion,and viral infectivity显示文摘Dear Editor,By the end of June 2020,the pandemic of coronavirus diseases 2019(COVID-19)had resulted in more than 10 million individuals,all over the world,being infected with the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2).1 The high contagiousness of SARS-CoV-2 virus was largely attributed to the relatively unique sequence composition in its spike(S)glycoprotein,which is in charge of the host entry by interacting with its cellular receptor angiotensin-converting enzyme 2(ACE2).2,3 The S glycoprotein can be processed into an N terminal S1 fragment that is responsible for receptor binding,and a C terminal S2 fragment that functions to promote membrane fusion.4 SARS-CoV-2 is a type of single-stranded positive-sense ribonucleic acid(RNA)virus,and an increasing number of mutations were identified across the SARS-CoV-2 genome,including the region encoding S glycoprotein.Nevertheless,the functional implications of these mutations remain largely unknown,we here reported the mutation analysis of S gene and a functional exploration of the dominant D614G mutation.Xiaoyi Jiang Zhengrong Zhang Chenxi Wang Hongguang Ren Lihua Gao Haoran Peng Zubiao Niu He Ren Hongyan Huang Qiang Sun 2020Signal Transduction and Targeted Therapy2020,5,1:5
5Near-Real-Time Carbon Emission Accounting Technology Toward Carbon Neutrality显示文摘Climate change is the greatest environmental threat to humans and the planet in the 21st century.Global anthropogenic greenhouse gas emissions are one of the main causes of the increasing number of extreme climate events.Cumulative carbon dioxide(CO_(2))emissions showed a linear relationship with cumulative temperature rise since the pre-industrial stage,and this accounts for approximately 80%of the total anthropogenic greenhouse gases.Therefore,accurate and reliable carbon emission data are the foundation and scientific basis for most emission reduction policymaking and target setting.Currently,China has made clear the ambitious goal of achieving the peak of carbon emissions by 2030 and achieving carbon neutrality by 2060.The development of a finer-grained spatiotemporal carbon emission database is urgently needed to achieve more accurate carbon emission monitoring for continuous implementation and the iterative improvement of emission reduction policies.Near-real-time carbon emission monitoring is not only a major national demand but also a scientific question at the frontier of this discipline.This article reviews existing annual-based carbon accounting methods,with a focus on the newly developed real-time carbon emission technology and its current application trends.We also present a framework for the latest near-real-time carbon emission accounting technology that can be widely used.The development of relevant data and methods will provide strong database support to the policymaking for China’s“carbon neutrality”strategy.Finally,this article provides an outlook on the future of real-time carbon emission monitoring technology.Zhu Liu Taochun Sun Ying Yu Piyu Ke Zhu Deng Chenxi Lu Da Huo Xiang Ding 2022Engineering2022,8,7:5
6Effective Improvement of the Photovoltaic Performance of Carbon-Based Perovskite Solar Cells by Additional Solvents显示文摘A solvent-assisted methodology has been developed to synthesize CH_3NH_3 PbI_3perovskite absorber layers.It involved the use of a mixed solvent of CH_3NH_3 I,PbI_2,c-butyrolactone,and dimethyl sulfoxide(DMSO) followed by the addition of chlorobenzene(CB).The method produced ultra-flat and dense perovskite capping layers atop mesoporous TiO_2 films,enabling a remarkable improvement in the performance of free hole transport material(HTM) carbon electrode-based perovskite solar cells(PSCs).Toluene(TO) was also studied as an additional solvent for comparison.At the annealing temperature of 100 °C,the fabricated HTM-free PSCs based on drop-casting CB demonstrated power conversion efficiency(PCE) of 9.73 %,which is 36 and 71 % higher than those fabricated from the perovskite films using TO or without adding an extra solvent,respectively.The interaction between the PbI_2–DMSO–CH_3NH_3I intermediate phase and the additional solvent was discussed.Furthermore,the influence of the annealing temperature on the absorber film formation,morphology,and crystalline structure was investigated and correlated with the photovoltaic performance.Highly efficient,simple,and stable HTM-free solar cells with a PCE of 11.44 % were prepared utilizing the optimum perovskite absorbers annealed at 120 °C.Chenxi Zhang Yudan Luo Xiaohong Chen Yiwei Chen Zhuo Sun Sumei Huang 2016Nano-Micro Letters2016,8,4:4
7Improvement in affinity and thermostability of a fully human antibody against interleukin-17A by yeast-display technology and CDR grafting显示文摘Monoclonal antibodies(m Abs) are widely used in many fields due to their high specificity and ability to recognize a broad range of antigens. IL-17 A can induce a rapid inflammatory response both alone and synergistically with other proinflammatory cytokines. Accumulating evidence suggests that therapeutic intervention of IL-17 A signaling offers an attractive treatment option for autoimmune diseases and cancer. Here, we present a combinatorial approach for optimizing the affinity and thermostability of a novel anti-h IL-17 A antibody. From a large na?ve phage-displayed library, we isolated the anti-IL-17 A m Ab 7 H9 that can neutralize the effects of recombinant human IL-17 A. However, the modest neutralization potency and poor thermostability limit its therapeutic applications. In vitro affinity optimization was then used to generate 8 D3 by using yeast-displayed random mutagenesis libraries.This resulted in four key amino acid changes and provided an approximately 15-fold potency increase in a cell-based neutralization assay. Complementarity-determining regions(CDRs) of 8 D3 were further grafted onto the stable framework of the hu Fv 4 D5 to improve thermostability. The resulting hybrid antibody9 NT/S has superior stabilization and affinities beyond its original antibody. Human fibrosarcoma cellbased assays and in vivo analyses in mice indicated that the anti-IL-17 A antibody 9 NT/S efficiently inhibited the secretion of IL-17 A-induced proinflammatory cytokines. Therefore, this lead anti-IL-17 A m Ab might be used as a potential best-in-class candidate for treating IL-17 A related diseases.Wei Sun Zhaona Yang Heng Lin Ming Liu Chenxi Zhao Xueying Hou Zhuowei Hu Bing Cuin 2019Acta Pharmaceutica Sinica B2019,9,5:4
8Static coarsening behaviour of lamellar microstructure in selective laser melted Ti–6Al–4V显示文摘Static coarsening mechanism of selective laser melted(SLMed) Ti–6Al–4V with a lamellar microstructure was established at temperatures from 700℃ to 950℃. Microstructure evolution revealed that high heat treatment temperature facilitated martensite decomposition and promoted lamellae growth. At each temperature, the growth rate decreased with increasing holding time. The static coarsening behaviour of SLMed Ti–6Al–4V can be interpreted by Lifshitz, Slyozov, and Wagner(LSW) theory. The coarsening coefficient were 0.33, 0.33–0.4, 0.4–0.5 for 700–800℃, 900℃ and 950℃, respectively. This indicated the coarsening mechanism was bulk diffusion at 700–800℃, and a combination of bulk diffusion and interface reaction at 900℃ and 950℃ conditions.Sheng Cao Qiaodan Hu Aijun Huang Zhuoer Chen Ming Sun Jiahua Zhang Chenxi Fu Qingbo Jia Chao Voon Samuel Lim Rodney R.Boyer Yi Yang Xinhua Wu 2019Journal of Materials Science & Technology2019,35,8:3
9Therapeutic strategies of glioblastoma (GBM):The current advances in the molecular targets and bioactive small molecule compounds显示文摘Glioblastoma(GBM)is the most common aggressive malignant tumor in brain neuroepithelial tumors and remains incurable.A variety of treatment options are currently being explored to improve patient survival,including small molecule inhibitors,viral therapies,cancer vaccines,and monoclonal antibodies.Among them,the unique advantages of small molecule inhibitors have made them a focus of attention in the drug discovery of glioblastoma.Currently,the most used chemotherapeutic agents are small molecule inhibitors that target key dysregulated signaling pathways in glioblastoma,including receptor tyrosine kinase,PI3K/AKT/mTOR pathway,DNA damage response,TP53 and cell cycle inhibitors.This review analyzes the therapeutic benefit and clinical development of novel small molecule inhibitors discovered as promising anti-glioblastoma agents by the related targets of these major pathways.Meanwhile,the recent advances in temozolomide resistance and drug combination are also reviewed.In the last part,due to the constant clinical failure of targeted therapies,this paper reviewed the research progress of other therapeutic methods for glioblastoma,to provide patients and readers with a more comprehensive understanding of the treatment landscape of glioblastoma.Hui Liu Weimin Qiu Tianyu Sun Lei Wang Chenxi Du Yanyu Hu Wenyuan Liu Feng Feng Yao Chen Haopeng Sun 2022Acta Pharmaceutica Sinica B2022,12,4:3
10The long-term prognosis and predictors of epilepsy:a retrospective study in 820 patients显示文摘Background:To investigate the prognosis and predictors for seizure control in epileptic patients in China.Methods:Eight hundred and twenty patients with epilepsy who visited Xuanwu Hospital from October 2017 to January 2020,were enrolled.The clinical information of the patients was obtained by retrospectively reviewing medical records.Prognostic measures of seizure control included remission,relapse and occurrence of drug resistance.The relationship of prognosis of seizure control with factors such as demographics,clinical characteristics and initial electroencephalography(EEG)features was investigated.Results:A total of 503(61.3%)patients experienced a 1-year remission and 330(49.3%of 669)had a 2-year remission.Idiopathic type of epilepsy(P<0.001),normal EEG(P<0.05),number of antiepileptic drugs(P<0.05)and seizure frequency of<1/month(P<0.001)at the first arrival predicted a remission independently.Of the 503 patients who achieved a 1-year remission,184(36.6%)experienced a relapse,due to external reversible causes(58 patients)or with unknown reversible triggers(126 patients).No factors were found to be associated with a relapse(P>0.05).At the end of the study,322 patients(39.3%)developed drug resistance.The development of drug resistance was associated with the following factors:symptomatic aetiology of epilepsy,epileptiform abnormality in EEG,number of antiepileptic drugs and seizure frequency of≥1/month at first arrival(P<0.001).For symptomatic epilepsy,patients with meningitis/encephalitis(P=0.007)were more likely to develop drug-resistant epilepsy than these with other causes.Conclusions:Remission is a common process.The type of epilepsy(idiopathic or symptomatic),EEG features,seizure frequency and treatment history at first arrival are related to both remission and terminal drug resistance.Among various causes of symptomatic epilepsy,meningitis/encephalitis is associated with the worst prognosis of epilepsy.Haoran Yang Jun Zhang Chenxi Yang Dan Wu Xiaoyun Liu Hongjuan Lu Wei Zhou Wei Sun 2021Acta Epileptologica2021,3,1:2
11Loss of hnRNP A1 in murine skeletal muscle exacerbates high-fat diet-induced onset of insulin resistance and hepatic steatosis显示文摘Impairment of glucose(Glu)uptake and storage by skeletal muscle is a prime risk factor for the development of metabolic diseases.Heterogeneous nuclear ribonucleoprotein A1(hnRNP Al)is a highly abundant RNA-binding protein that has been implicated in diverse cellular functions.The aim of this study was to investigate the function of hnRNP A1 on muscle tissue insulin sensitivity and systemic Glu homeostasis.Our results showed that conditional deletion of hnRNP Al in the muscle gave rise to a severe insulin resistance phenotype in mice fed a high-fat diet(HFD).Conditional knockout mice fed a HFD showed exacerbated obesity,insulin resistance,and hepatic steatosis.In vitro interference of hnRNP Al in C2C12 myotubes impaired insulin signal transduction and inhibited Glu uptake,whereas hnRNP Al overexpression in C2C12 myotubes protected against insulin resistance induced by supraphysiological concentrations of insulin.The expression and stability of glycogen synthase(gysl)mRNA were also decreased in the absence of hnRNP A l.Mechanistically,hnRNP Al interacted with gys l and stabilized its mRNA,thereby promoting glycogen synthesis and maintaining the insulin sensitivity in muscle tissue.Taken together,our findings are the first to show that reduced expression of hnRNP Al in skeletal muscle affects the metabolic properties and systemic insulin sensitivity by inhibiting glycogen synthesis.Mingxia Zhao Lihong Shen Zijun Ouyang Manru Li Guoliang Deng Chenxi Yang Wei Zheng Lingdong Kong Xuefeng Wu Xudong Wu Wenjie Guo Ye Yin Qiang Xu Yang Sun 2020Journal of Molecular Cell Biology2020,12,4:2
12Refined microstructure and enhanced mechanical properties in Mo-Y_(2)O_(3)alloys prepared by freeze-drying method and subsequent low temperature sintering显示文摘The ultrafine Mo-Y_(2)O_(3)composite powders were successfully synthesized by innovative freeze-drying method.Consequently,the freeze-dried Mo-Y_(2)O_(3)composite powders with high sintering activities possess an average grain size of 54 nm.After low temperature sintering at 1600°C,the Mo-Y_(2)O_(3)alloys maintaining a high density(99.6%)have the finest grain size(620 nm)comparing with available literature about oxide dispersion strengthened molybdenum alloy(ODS-Mo).The oxide particles remain their small size(mainly<50 nm)within Mo grains and at Mo grain boundaries.Furthermore,the Y_(5)MO_(2)O_(12)particles were firstly observed within Mo matrix,and its formation can absorb nearby oxygen impurities,which involves the purification of Mo matrix.The mechanical properties show that Mo-Y_(2)O_(3)alloy possess a high hardness of 487±28 HV_(0.2),a high yield strength of 902 MPa,a high compressive strength of1110 MPa,respectively.Our work suggests that freeze-drying and subsequent low temperature sintering can shed light on the preparation of ultrafine ODS-Mo alloys with high performance.Weiqiang Hu Tao Sun Chenxi Liu Liming Yu Tansir Ahamad Zongqing Ma 2021Journal of Materials Science & Technology2021,,29:2
13Enhancing stability by tuning element ratio in 2D transition metal chalcogenides显示文摘Two-dimensional(2D)transition metal chalcogenides(TMCs)are known to be susceptible to the atmosphere,which greatly obscures the intrinsic physical and chemical properties.The quantitative origin of the instability on the atomic scale has not been well investigated due to the lack of environmentally stable TMCs sample.Here,we find the stability of the grown TMCs is strongly relevant to their initial element ratios,and thus the stoichiometric bonded TMCs have favorable stability,benefitted from the TMCs with controllable chalcogenisation.In this study,the degree of structural degradation has been quantitatively defined by the reduced element ratio of chalcogen to metal through the time-dependent characterizations,and the non-stoichiometric ratios in TMCs reveal the atomic lattices with point defects like additive bonds or vacancies inside.This study not only provides a potential view to fabricate environmentally stable TMCs based devices,but also will bring an effective feasibility of stacking stable vertical heterostructures.Zhenjia Zhou Tao Xu Chenxi Zhang Shisheng Li Jie Xu Litao Sun Libo Gao 2021Nano Research2021,14,6:2
14Simulation of aggregation effects on co-fired biomass-coal ash in an electrostatic precipitator显示文摘Aggregation of fine ash into larger particles benefits fly ash removal in an electrostatic precipitator.Thermal aggregation,turbulent aggregation,and electrical aggregation of fine ash (derived from co-firing of biomass fuel and anthracite coal) was simulated under different conditions in an electrostatic precipitator.A population balance model and user-defined function in Fluent were assumed to obtain aggregation kernel functions and calculate the aggregation effects on the co-combusted particles.The results show that electrical aggregation had an obvious effect on both micron-and submicron-sized particles.For submicron particles,the effect of thermal aggregation is about ten times greater than turbulent aggregation.Meanwhile,for micron-sized particles,turbulent aggregation is about seven times greater than thermal aggregation.Therefore,particle aggregation in the electrostatic precipitator mainly occurs because of electrical aggregation,supplemented by thermal aggregation and turbulent aggregation.When the flow velocity is 1.0 m/s,particle volume fraction is 1.4%,and biomass co-firing ratio is 10%,the effects of all three aggregation processes on ash particles are optimized.Jianyi Lu Zhe Yang Bingyi Xu Zhiyong Zhou Chenxi Sun 2020Particuology2020,18,3:1
15Crystal structures and magnetic properties of two complexes synthesized from manganese and halogenophenyl-substituted nitronyl nitroxide显示文摘Zhang Chenxi Zhao Xiangyu Sun Nana 2011Inorg Chim Acta2011,367,1:1
16Joint Resource Allocation and Admission Control in Sliced Fog Radio Access Networks显示文摘Network slicing based fog radio access network(F-RAN) has emerged as a promising architecture to support various novel applications in 5 G-and-beyond wireless networks. However, the co-existence of multiple network slices in F-RANs may lead to significant performance degradation due to the resource competitions among different network slices. In this paper, the downlink F-RANs with a hotspot slice and an Internet of Things(Io T) slice are considered, in which the user equipments(UEs) of different slices share the same spectrum. A novel joint resource allocation and admission control scheme is developed to maximize the number of UEs in the hotspot slice that can be supported with desired quality-of-service, while satisfying the interference constraint of the UEs in the Io T slice. Specifically, the admission control and beamforming vector optimization are performed in the hotspot slice to maximize the number of admitted UEs, while the joint sub-channel and power allocation is performed in the Io T slice to maximize the capability of the UEs in the Io T slice tolerating the interference from the hotspot slice. Numerical results show that our proposed scheme can effectively boost the number of UEs in the hotspot slice compared to the existing baselines.Yuan Ai Gang Qiu Chenxi Liu Yaohua Sun 2020China Communications2020,17,8:1
17Preparation and characterization of Nafion/SPEEK layered composite membrane and its application in vanadium redox flow battery显示文摘Luo Qingtao Zhang Huamin Chen Jian You Dongjiang Sun Chenxi Yu Zhang 0,,:1
18Investigations on transfer of water and vanadium ions across Nafion membrane in an operating vanadium redox flow battery显示文摘Chenxi Sun Jian Chen Huamin Zhang Xi Han Qingtao Luo 2009Journal of Power Sources2009,,3:1
19Preparation and characterization of Nafion/SPEEK layered composite membrane and its application in vanadium redox flow battery显示文摘Luo Qingtao Zhang Huamin Chen Jian You Dongjiang Sun Chenxi Zhang Yu 2008Journal of Membrane Science2008,325,2:1
20Scientific objectives of the Hot Universe Baryon Surveyor(HUBS) mission显示文摘The Hot Universe Baryon Surveyor(HUBS) is a proposed space-based X-ray telescope for detecting X-ray emissions from the hot gas content in our universe. With its unprecedented spatially-resolved high-resolution spectroscopy and large field of view,the HUBS mission will be uniquely qualified to measure the physical and chemical properties of the hot gas in the interstellar medium, the circumgalactic medium, the intergalactic medium, and the intracluster medium. These measurements will be valuable for two key scientific goals of HUBS, namely to unravel the AGN and stellar feedback physics that governs the formation and evolution of galaxies, and to probe the baryon budget and multi-phase states from galactic to cosmological scales. In addition to these two goals, the HUBS mission will also help us solve some problems in the fields of galaxy clusters, AGNs, difuse X-ray backgrounds, supernova remnants, and compact objects. This paper discusses the perspective of advancing these fields using the HUBS telescope.Joel Bregman Renyue Cen Yang Chen Wei Cui Taotao Fang Fulai Guo Edmund Hodges-Kluck Rui Huang Luis C.Ho Li Ji Suoqing Ji Xi Kang Xiaoyu Lai Hui Li Jiangtao Li Miao Li Xiangdong Li Yuan Li Zhaosheng Li Guiyun Liang Helei Liu Wenhao Liu Fangjun Lu Junjie Mao Gabriele Ponti Zhijie Qu Chenxi Shan Lijing Shao Fangzheng Shi Xinwen Shu Lei Sun Mouyuan Sun Hao Tong Junfeng Wang Junxian Wang Q.Daniel Wang Song Wang Tinggui Wang Weiyang Wang Zhongxiang Wang Dandan Xu Haiguang Xu Heng Xu Renxin Xu Xiaojie Xu Yongquan Xue Hang Yang Feng Yuan Shuinai Zhang Yuning Zhang Zhongli Zhang Yuanyuan Zhao Enping Zhou Ping Zhou 2023Science China(Physics,Mechanics & Astronomy)2023,66,9:1
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